重氮甲烷 、
3β-acetoxylanost-8-en-23-oxo-26-oic acid 以
乙醚 为溶剂,
生成 (R)-6-((3S,5R,10S,13R,14R,17R)-3-Acetoxy-4,4,10,13,14-pentamethyl-2,3,4,5,6,7,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-2-methyl-4-oxo-heptanoic acid methyl ester